Ukukhetha isihlombe sesikrini se-polyurethane esihle ngokwesifundo sokusikrini kwamaphakathi amanquma okuhamba kwezindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zokuphatha izindawo zok......

Okwenza Izikrini Ezindinganiselwe Zihluleke Ekuhloleni Ama-ore Anomswakama Omkhulu

Ukumunca, ukuhlanganisa nokulahlekelwa amandla: Izimbangela eziyinhloko kuma-ore anobumba, > 18% umswakama

Izinyathelo zokubhala zokuzimisa ziyaphila uma kusebenziswa ekuproseseni kwezinkulungwane zokugqibela ezinamandla amanzi angaphezu kwe-18%. Ukubhala kwenza ukuthi izinkulungwane eziyisikhathi sokubhala ziyakhiwa ngokuthi ziyabamba izinyathelo, futhi ukubhala kwenza ukuthi izinkulungwane eziphakathi kwezinyathelo ziyabhalwa ngokuthi ziyabamba izinyathelo ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi z...... izinyathelo zokubhala zokuzimisa zokuphatha izinkulungwane zokugqibela ezwenziwe ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa ngokuthi ziyabhalwa......

Izindlela zokubhala: ukupheleka kwe-30–50% kokuthengisa ngokuthi amanzi ayabhalwa

Idatha yokusebenza iqinisekisa ukwehla okukhulu komkhiqizo ezindaweni ezinomswakama ophakeme. Izindawo zokukhiqiza insimbi ezicubungula amanzi anomswakama ongu-22% zafakazela ukwehla kwe-30%-50% kokukhiqizwa kwensimbi phakathi namasonto ayisishiyagalombili ngenxa yokuvalwa kwe-screen surface. Emsebenzini we-hematite waseBrazil, izikrini zensimbi-mesh zazidinga ukuhlanzwa kwamahora amathathu nsuku zonke ukuze kugcinwe umthamo wokuqalaokwengeza u-$220k/ngonyaka ngezindleko zabasebenzi nezikhathi zokuphumula. Ukucwiliswa okubangelwa umswakama nakho kwandisa ukusetshenziswa kwamandla ngo-18% ngethani ngalinye elicutshungulwayo njengoba izinto zidlula izigaba ezivaliwe. Lezi zinkinga zemboni zibonisa ukuthi kungani ukuphathwa komswakama kukodwa kungakwazi ukubhekana nemikhawulo yokwakhiwa kwezikrini ezingakhelwanga imiklamo emibuthanweni ecebile ngodaka.

Izingxenye Ezingagcini Amanzi Ezibizwa Nge-Hydrophobic Polyurethane: Inzuzo Eyinhloko Yento Engaqwali

Isayensi yamandla aphezulu: Indlela ama-engeli okuxhumana <90° avumela ngayo ukuhlanzeka okuzenzakalelayo emathulini omhlaba omanzi

Imedia yepolyurethane engenakho umsindo wokugcina amandla emafutha ekupheleni kwezinkulungwane zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuzo zokugcina amandla emafutha kuz......

Polyether vs. polyester PU: Umphumela wokugcina amandla emafutha (ASTM D570) njengokubhekisela kwezindawo zokusebenza kuzo zokugcina amandla emafutha

Ukukhetha umfanekiso uyaphakanyisa kakhulu ubudlelwano bokuphila kwemilayezo yokuqondisa emaqhingweni amahlanu. I-polyurethanes ebase ku-polyether zibonisa ukuthi zinamandla okugcina okuhamba kwezinkambu, zikhubaza 92% yamandla okugcina ngokwesikhathi sokugcina emasimu apho i-pH ayi-3–11 ngemuva kwezinsuku ezingu-500 ngokwesicelo sika-ASTM D570. Amaphuzu ase-polyester ayagula kabusha kakhulu ngeminye imizamo ngoba izigaba zase-ester ziyisithembiso. Kwimilayezo yamaphuzi wezinkambu noma yiziphi ziyabona ukuthi izilayezo ze-polyether zihlala iminyaka emibili nezinsuku ezingu-14, ngakho-ke izilayezo ze-polyester zihlala izinsuku ezingu-150. Izindlela zokuhlinzeka zokuhlukanisa ziyi:

• Ukufakwa Kwamakhombisi : Izihlukanisi zase-polyether ziyakhathazeka kubulungiswa kwezinkambu noma kwezinkambu zokufaka
• Ukukhathazeka kubulungiswa : <2% yokuguqula kwezinhlobo emva kwezinsuku ezingu-30 zokufakwa emasimu
• Ukumukela Kokugayaya : Iyakhathazeka kubulungiswa kokugcina ukuthi izihlukanisi ziyahlala zihlukene ngokwesikhathi sokusebenza noma yiziphi izinkambu zokugcina

Izilayezo ze-Polyurethane zokugcina izihlukanisi: Ukugcina kwezihlukanisi ngokwesikhombisa

Isikhombisa sezihlukanisi siyakunciphisa isibopho sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina ngokwesikhathi sokugcina......

Amasikrini amasheshi amadala asebenzisa imibhalo yamandla ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisikili ayisik......

Umphakathi wokuphakama kwezinyathelo zokubeka kuyenza ukuthi izinto zihlukwe ngokuvibrasi kanye nokuhlanza kwesiluri

Uprofayili wokuphambuka kwe-cone wokusebenzisa i-PU screens esikhethweyo uyasebenzisa imvelo yokuqhubeka ukuze kuthintwe amaphakathi ngaphandle, ukuzimela amandla okugcina amaphakathi okwesithuthi esihlukile kusurfaces soka-screen. Ngesikhathi isikrini sokubusa sifika ku-5G, izilimi zokwesithuthi zihlukana ngokuphambuka kwezinye zezilimi zokwesithuthi zokuphambuka kwe-polyurethane engeziwe kumfanekiso wokuphambuka kwesurfacing esingaphansi, nokuvutha kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuhlanganiswa kwezindawo zokuh......

Ukuvuselela Ububanzi ne-Open Area Ukusiza Kukhona Kwamaphakathi Okwesithuthi

Kukhetha kwezikhetho zokuscreening kwemithombo yezinkulungwane ezingakhiwa ngamandla, ukhetha kwezinkulungwane zokusebenza zokuphatha kwe-polyurethane nokuvula kwezinkulungwane zokuvula kuzokubhekisa ngqo ekusebenzeni. Amaphaneli amakhulu (25–30 mm) akhathazela ukuthi kufotshwa ngokufotshwa kwezinkulungwane kodwa kunciphisa izinkulungwane zokuvula, kuyenza ukuthi kubhekiswe kwezinkulungwane zokuvula ngezinkulungwane zokuvula kungaphezu kwe-18%. Ngaphandle kwalokho, ukuvula kwezinkulungwane (>20%) kuhleza ukugcina kwezinkulungwane kodwa kufuna amaphaneli amancane okunqoba kwezinkulungwane ezinconywa ngokukhawuleza. Ukuboniswa kwezindustria kubonisa ukuthi izinkulungwane zokuvula zezinkulungwane zezinkulungwane (15–20%) zokuvula nezinkulungwane zezinkulungwane (25–30 mm) zikunciphisa izinkulungwane zokuvula ngama-40% emithombeni yomfutho nesiliva noma kwezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane z......

Imibuzo Evame Ukubuzwa

Kungani amascreen amahle ayasebenza kahle ngezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane zezinkulungwane z...... Amasikrini amahle ayaphela ngokwakhiwa kwezikhathi zokuphakama nokubamba kwezinkulungwane zokuphakama kwezinkulungwane zokuphakama, okusindisayo ukuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama, okusindisayo ukuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama.

Kuzimelela nini amasikrini we-hydrophobic polyurethane? Amasikrini we-hydrophobic polyurethane aqala isibonelo se-izinyathelo zokukhula, abuyisa ukuthi amanzi asihlale kumgodi, futhi abuyisa ukuthi amasikrini ayasebenza ngokwakhe, okusindisayo ukuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama, nokuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama.

Kungani i-polyether polyurethane iyadura ngempela emazulwini apho amanzi angena ngokuphakama kungezi-polyester? I-polyether polyurethane iyasemthethweni yamagama, iyabuyisa ukuthi amanzi asihlale kumgodi, futhi iyabuyisa ukuthi isibonelo se-izinyathelo zokukhula siyadura ngempela kungezi-polyester polyurethane, okusindisayo ukuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama, nokuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama.

Kungani amasikrini we-tapered PU ayabuyisa ukuthi kubhekwe phambili? Amasikrini we-tapered-slot ayabuyisa ukuthi kubhekwe phambili nokuthi kubhekwe phambili ngokuthi akhombisa izikhathi zokuphakama ezinhlangothi zokuphakama, okusindisayo ukuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama, nokuthi kubhekwe phambili nokuthi kubhekwe phambili kwezinkulungwane zokuphakama.

Yini inkulumo yokusebenzisa amasikrini okufanele kubhekwe phambili kwezinkulungwane zokuphakama? Ukulinganisa kwezinkulungwane zokusebenza kwemithambo yezinkulungwane zokusebenza kwe-25–30 mm nokubalwa kwezinkulungwane zokusebenza kwe-15–20% kusiza ekuthinteni kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zokusebenza kwezinkulungwane zok......